https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103650
--- Comment #6 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:0959f0e0cee6ecff4242cf2f1e5c8db29b09904b commit r16-4089-g0959f0e0cee6ecff4242cf2f1e5c8db29b09904b Author: Jonathan Wakely <jwak...@redhat.com> Date: Fri Sep 19 12:11:26 2025 +0100 libstdc++: Remove unwanted STDC_HEADERS macro from c++config.h [PR79147] Similar to r16-4034-g1953939243e1ab, this comments out another macro that Autoconf adds to the generated config.h but which is not wanted in the c++config.h file that we install. There's no benefit to defining _GLIBCXX_STDC_HEADERS in user code, so we should just prevent it from being defined. libstdc++-v3/ChangeLog: PR libstdc++/79147 PR libstdc++/103650 * include/Makefile.am (c++config.h): Adjust sed command to comment out STDC_HEADERS macro. * include/Makefile.in: Regenerate.